| .text | |
| .globl _mpdigdiv | |
| _mpdigdiv: | |
| /* Prelude */ | |
| pushl %ebp /* save on stack */ | |
| pushl %ebx | |
| leal 12(%esp), %ebp /* %ebp = FP for now */ | |
| movl 0(%ebp), %ebx /* dividend */ | |
| movl 0(%ebx), %eax | |
| movl 4(%ebx), %edx | |
| movl 4(%ebp), %ebx /* divisor */ | |
| movl 8(%ebp), %ebp /* quotient */ | |
| xorl %ecx, %ecx | |
| cmpl %ebx, %edx /* dividend >= 2^32 * divisor */ | |
| jae 2f | |
| cmpl %ecx, %ebx /* divisor == 1 */ | |
| je 2f | |
| divl %ebx /* AX = DX:AX/BX */ | |
| movl %eax, (%ebp) | |
| 1: | |
| /* Postlude */ | |
| popl %ebx | |
| popl %ebp | |
| ret | |
| /* return all 1's */ | |
| 2: | |
| notl %ecx | |
| movl %ecx, (%ebp) | |
| jmp 1b |